Ski boot



FIG. 1 is a front elevational view of a ski boot showing my new design;

FIG. 2 is a rear elevational view of the ski boot;

FIG. 3 is an elevational view showing one side of the ski boot;

FIG. 4 is an elevational view showing the other side of the ski boot;

FIG. 5 is a top view of the ski boot; and,

FIG. 6 is a bottom view of the ski boot. 

The ornamental design for a ski boot, as shown. 